Friday, January 22, 2010

Prime Factorisation

Textbook p9 #25:
The Prime factorisation of a number is 2^4 X 3^5 X 7^2 X 11.
Write down 3 factors of the number that are greater than 100.
(Hint: 16 X 11 = 176, which is a factor.)
How I work out my answer:
First, I know that 2,3,7 and 11 are factors of the number but they are smaller than 100.
As to find out 3 factors of the number that are greater than 100, I simply just take 7^2 X 11 and 3^5 X 11. Like this, I will get 539 and 2673.
Because of the example given is the answer of 2^4 X 11, I feel that i should not write the same. Therefore I simply just take 3^4 X 11 and got 891 as another answer.
Lastly, I calculated 2^4 X 3^5 X 7^2 X 11 and the answer is 2095632.
I then use the answer to divide the factors to ascertain my answer.

So, my answer is: 539, 891 & 2673.

Textbook p9 #26:
The Prime factorisation of two numbers are 2 X 3^2 X 7^3 X 13 and3 X 7^2 X 13^3 X 17 .
Write down 3 common factors of the numbers.
From these two numbers, I can see some similar prime factors in them.
So, I simply see what are the similar prime factors and they are the common factors of this two numbers.
They are: 1(a common factor is every number above 0),3 & 7.

JJ(:

Wednesday, January 20, 2010

Mathematics HW(:

A mathematician proposed that "Every even number greater than 2 can be expressed as a sum of two prime numbers." Do you agree? Why?
Yes, I agree.
Even numbers have several ways to be the sum of two prime numbers. For example, the number 22 can be shown as '11+11', '3+19', or '5+17'. By looking at these examples, it appears that the higher the even number, the more pair of prime numbers there are that add up to it.

There is an assumption that says that every even number can be expressed as the sum of two prime numbers at least in one way. This assumption is known as Goldbach's conjecture, after Christian Goldbach, a Prussian mathematician who propounded it. It remains to be one of the most ancient problems that is yet not completely solved in the field of mathematics. The conjecture basically states that every even integer that is greater than the number 2 can be expressed as the sum of two primes.
Adapted from: http://www.blurtit.com/q710414.html

I understand that even numbers apart from 2 can be expressed as the sum of two prime numbers as 2 is the only prime number that is an even number.

JJ(:

Monday, January 18, 2010

Communication(:


Why is communication important?

It is important as in the social field it is regarded as a very essential thing to keep in touch with other people(such as relatives and old friends). Communication would also allow people to express their feelings.


What is/are your favourite form/s of communication? Why?

My favourite form of communicating is by talking on the telephone. I find it very convenient to talk to one another as you do not need to wait for the other person to reply. Besides that, it would also allow three people or more to talk in a conference, making to it much easier.


How do you decide which form of communication to use in a situation?

It depends on what kind of situation. For most situations, I would use my handphone as it operates very fast and is very convenient.


What difficulties do you face in communicating with others?

I do not really face much problems in communicating with others except sometimes I do not catch what others have said.


JJ(:

Tuesday, January 12, 2010

12 January: Numbers as a Language


These are the numerals! ^^

After researching on the internet about different kinds of numeral systems and looking through the developement of the systems, I have decided to choose the Mayan Numeral System to represent 2010. I chose this because Mayan Numerals makes a good connection between Math and Social Studies. Besides that, adding and subtracting numbers by using this system is also very easy.
Although, multiplication and division may be a little hard, it would just require a bit more effort. We should do our best in everything. A little obstacle is easy to break. So in this year 2010 at SST, I would just put in more effort in my work (:

JJ(:

Wednesday, January 6, 2010

Amazing Race(:


http://images.clipartof.com/small/26582-Clipart-Illustration-Of-A-Row-Of-Colorful-Red-Yellow-Green-Pink-And-Red-Toy-Alphabet-Blocks-Spelling-Out-LEARNING.jpg

What do you understand about the school value "Expanding Our Learning Networks"?
From the school value “Expanding Our Learning Network”, I understand that I cannot just keep looking at the textbooks, reading it and memorising the key points in it. By doing this, it will not help much in my studies as this king of method is not useful. I must learn new things not just from books, but also outside the class room(eg. around the community).

Why is this value important and how will it help you in your learning experience in SST?
It is important as it will not only allow me to gain more knowledge, but also allow me to experience the world outside.
It will help me in my learning by allowing me to go beyond what I learn in SST. Like that, I would also get to know more people and would be able to learn from them.

JJ(:

Tuesday, January 5, 2010

Team Building Challenge


A team working together. (;
http://api.ning.com/files/G1IyfGgcEGTZvRKVHh9*Kss*kRwe6q4td-kSc7g1LA4_/team_building_ring.jpg

What do you understand about the school value "Forging Excellence"?
From the school value Forging Excellence, I understand that it is important to excel in studies as well as in every other things that we do(eg. group work, projects and even the daily work we do). I also think that it means we need to foster a good relationship with our schoolmates and also our teachers.

What are the strengths that you think you possessed which can help you to achieve excellence?
I think that I possess self-confidence, determination to finish whatever I need to do & I co-operate well with other group members, which can help me to achieve excellence.

What other attributes and attitudes do you think you should cultivate to excel in the things you do?
I should listen to other people’s opinion and decide on one idea, rather than squabbling over a small issue. I should also learn not to be distracted by other people.

How can you contribute to help your class succeed?
I can gather everyone in the class to participate in the activities and help my other classmates when they are in need of help. I can also make sure i play my part in doing the activities and be more participative.

Monday, January 4, 2010

My Reflection On The Bridge Building Activity


http://farm3.static.flickr.com/2088/2329880442_940a2c2f4d.jpg?v=0

I was anticipating for the bridge building activity to start as i would be doing them with my group members. I thought that we would be able to do it well at first. However, I was wrong. We had so many ideas given by all the group members until we do not know which one to choose. We started bickering on whose idea to use. After a long period of squabbles, we finally decided to the retractable bridge.

While doing it, we encountered many difficulties(eg. the boat would not be able to pass through as there were strings blocking it).
In the End, we had to re-do the whole bridge and we were back to square one. Fortunately, one of our group members gave a good idea and we started working on it immediately. We managed to finish the bridge in time.

From this activity,our group members all agreed that we should not have bickered so much. Only to the last part had we really work together, helping each other to finish the model. In the next few activities, i hope we would just decide on one idea and not be flicker minded. Life is a learning experience. I believe we can do a better job!

(: